Questions

I founded a company but have brought on an industrial designer and engineer on board as co-founders. They both bring unique skill sets and will put in the sweat equity, I am the CEO and will work in more the business intelligence side of things alongside PM duties.
I have some hesitation giving them a large amount of ownership, as that would dilute my own. They deserve credit for their contribution, but to have my own shares dwindle into the 30-40's percentage of ownership gives me concern. Looking to vest month to month over a period of 2 or 3 years.
Thoughts are welcome..